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Activity 9

Activity 9. Cell Membrane Structure and Function. The Cell Membrane. Read the introduction . What basic characteristics of the cell membrane have you learned from models in the previous activities ?. Challenge. How do the structures of the cell membrane help it function?.

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Activity 9

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  1. Activity 9 Cell Membrane Structure and Function

  2. The Cell Membrane

  3. Read the introduction. • What basic characteristics of the cell membrane have you learned from models in the previous activities?

  4. Challenge • How do the structures of the cell membrane help it function?

  5. The questions in the reading do not require a written response, but you should answer them in your mind. The answers will help you to understand the reading.

  6. Analysis 3 • A. What are the functions of the cell membrane? • B. Explain which parts of the cell membrane allow it to perform these functions.

  7. Analysis 5 • Explain how the cell membrane helps the cell maintain homeostasis – a stable internal environment. Name specific structures of the cell membrane and describe their functions in your explanation.

  8. Analysis 6 • Imagine a single-celled organism living in a pond. What would happen to the organism if runoff from irrigation caused the pond to become significantly salty? Use evidence to support your explanation.

  9. Revisit the Challenge • How do the structures of the cell membrane help it function?

  10. Key Vocabulary • active transport • cell membrane, membrane • diffusion • endocytosis • exocytosis • facilitated diffusion • fluid mosaic model • lipid • lipid bilayer • macromolecule • osmosis • passive transport • phospholipid • phospholipid (lipid) bilayer • protein • semi-permeable, selectively permeable • vesicle • virus

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